Flush casement windows

  • Beautiful flush exterior appearance
  • Slim styling
  • Clean sightlines and flat finish
  • Smooth weld giving almost invisible joints
  • Aesthetically pleasing modern look
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What are flush casement windows?

Flush casement windows, less commonly referred to as flush sash windows, are hinged on one side of the frame and open outward with a push out motion/operation. Different to standard casement windows, the sash (the opening part of the window) sits flat (flush) with the surrounding frame.

Increasingly the popular choice for homeowners, flush casement windows blend traditional 19th century styling with modern performance, delivering a low maintenance, authentic look with the superior energy efficiency and security assurance that you should demand from new window installations.

With each and every window made to measure by our team of specialists and tailored to complement your property and personal taste, there are no limitations to the homes that our flush casement windows suit. Some of the properties that we’ve installed in include new build or modern homes, period or traditionally styled homes, conservation area (where timber or conservation approved uPVC windows are installed), and graded properties (where timber has been installed).

The choice is endless, as is our devotion to you and your household efficiency and security.

Contemporary, slim styling gives a modern look.
Neat, clean lines and a flat finish.
Optional trickle vents.
Optional Georgian or astragal bars.
No visible lip. Sash closes flush into the outer frame, sitting in line with the face of the window when closed.
Smooth welded (diagonal/arrow) joints giving almost invisible joints. Traditional mechanical (90° block) joints also available.

Why buy a truhouse. flush casement window?

Our product

Premium quality, not price tag

Think good old-fashioned quality and craftsmanship has to be expensive? Think again. After 40 years testing hundreds of windows and doors, we’ve found premium quality without the premium price tag, right here in Britain.

Tailored to you

The way you live isn’t one-size-fits-all, so why should your windows be? Choose from 3 frame materials, 490+ colours, 4 finishes, a wide range of matching hardware, standard or decorative glass, double or triple glazing, optional trickle vents, any size and configuration. Your window, your way.

Energy efficient

Say goodbye to hefty heating bills and fold those winter jumpers away with airtight seals and A+ energy rating as standard. Save the planet whilst saving your wallet.

Noise reducing

Get ready to sleep through the night with high-performance acoustic glazing that reduces traffic noise and blocks out that noisy neighbour (… you know the one).

Safe and secure

Relax and let our multipoint locking system and added security claws take care of you and your property, so that you can take care of the things that matter most.


Rotting, warping, discolouration and arduous maintenance are a thing of the past with our market-leading, premium-grade materials.

Our service

Six simple steps

Improving your home should be one of life’s little pleasures, not pains – that’s why we’ve made it simple. From quote to survey, order, manufacture, installation and guarantee, we look after you every step of the way.

Honest pricing

No more pushy salesmen inflating prices before bombarding you with bogus offers. We aren’t on commission, and happily reveal the tru. costs behind our replacement windows and doors – from materials to labour – then offer them to you, minus the “traditional” markup. We add value, not pound signs.

No subcontracting

Every job is important to us, so we do all of the installation ourselves. Our window and door installation teams are fully employed, and as invested in quality and professional service as everyone at truhouse.

10-year guarantee

Our windows and doors are designed to stand the test of time – we’ll register your installation with FENSA and give you a 10-year guarantee to prove it.

Raising the bar

We hear you – double glazing has a bad reputation. Rather than simply meeting expectations, we work tirelessly to exceed them and elevate the industry standard for excellence. With support from our employees, customers, partners,  and the Glass and Glazing Federation (GGF), we are paving the way.

Material options

At truhouse. we offer flush casement windows in 3 different frame materials to suit your needs – uPVC, timber, and timber alternative:

  • Smooth welded joints (diagonal/arrow joints)
  • High durability
  • Low maintenance
  • Extremely cost effective
  • Quick manufacture and installation
  • 35-year average life expectancy
  • Traditional mechanical joints (90° block joints)
  • FSC® certified sustainable redwood and hardwood
  • Medium to high durability
  • Conservation area compliant
  • More maintenance than other materials
  • Longer manufacture and installation
  • 60-year average life expectancy
  • Traditional mechanical joints (90° block joints)
  • Realistic woodgrain effect
  • High durability
  • Conservation area compliant (Article 4 direction)
  • Low maintenance
  • Significantly more cost effective than timber
  • 35-year average life expectancy

Colour and finish options

Whether you opt for uPVC, timber, or timber alternative flush casement windows, we offer a tru.ly extensive range of hard-wearing single or dual window colours and window finishes to meet your needs, spanning:

  • 12 Standard colours
  • 6 Heritage colours
  • 148 Farrow & Ball colours
  • 213 RAL Classic colours
  • 118 British Standard 4800 colours
  • Matt finish
  • Satin finish
  • Gloss finish
  • Natural hardwood finish
  • Foiled woodgrain finish

Already know what colour you’d like? Great! If not, our friendly experts can help identify the perfect window colour and finish for you! Whether you’re looking to complement your home’s brickwork or rendering, yours or your neighbours existing window units, or stand out from the crowd, we’re sure to have the perfect match for you.

Hardware options

Window hardware, also commonly called window furniture or window fixtures and fittings, refers to the handle, peg stay, and butt hinges – all of which play an integral part in achieving your desired look and ensuring your flush casement windows operate effortlessly and stand up to decades of use.

From traditional to contemporary, our hardware comes in a variety of styles and colour finishes to complement your home’s architectural style and help achieve your home design goals, including:

  • Push button handles (inline or offset)
  • Pear drop handles
  • Monkey tail handles
  • Pear drop peg stays (functional or decorative)
  • Monkey tail peg stays (functional or decorative)
  • Butt hinges (working or dummy)
  • Black and antique black
  • Bronze and bronze red
  • Electro gold,  gold, antique brass, and rumbled brass
  • Polished chrome, satin chrome, polished nickel, satin nickel, graphite, pewter patina, and rumbled pewter
  • White

Designed for superior functionality, all truhouse. hardware is made to last and resist fading and discolouration by sunlight, humidity, and other harsh environmental factors.

Glass and glazing options

In addition to clear glass, flush casement windows can be fitted with any one of 20 etched glass or textured glass designs, each offering varying levels of obscurity to meet your privacy or style needs.

For a heritage feel, decorative glazing bars (leaded bars, Georgian bars, and astragal bars) can also be mounted to your window panes in a variety of different configurations.

All truhouse. flush casement windows are double glazed and A+ rated as standard, with the option to upgrade to triple glazing or apply additional lamination and surface coatings that help control the amount of light and heat entering and leaving your home.

Understanding and choosing the right glass and glazing options will help ensure you’re investing your money wisely in windows that will give you both the look and the energy efficiency you require. Let us know what you’re looking to achieve and our friendly experts will assess your environment, discuss options, and advise the best glazing solution for you.

Get inspired

See how flush casement windows from truhouse. can transform a home, spark new design ideas, and imagine the possibilities.

Flush casement window

Material: uPVC (PVC-u)
Colour: Pure white (RAL 9010)
Property type: Modern home

Flush casement window

Material: uPVC (PVC-u)
Colour: Pure white (RAL 9010)
Property type: Modern home

Flush casement window

Material: uPVC (PVC-u)
Colour: Painswick (RAL 7038)
Property type: Modern home

Flush casement window

Material: uPVC (PVC-u)
Colour: Painswick (RAL 7038)
Property type: Modern home

Flush casement window

Material: Timber alternative
Colour: Silvered oak (RAL 7006)
Property type: Modern home

Flush casement window

Material: Timber alternative
Colour: Chalk white (RAL 9016)
Property type: Modern home

Flush casement window

Material: Timber
Colour: Irish oak (RAL 1011)
Property type: Modern home

Flush casement window

Material: Timber
Colour: Irish oak (RAL 1011)
Property type: Modern home

Want to see more? Take a look at our full installation gallery, where you can filter and sort by window type, material, colour, and property type.

Visit the installation gallery

Safety and security

In addition to frame composition and glazing, window safety and security is largely dependent upon the locking and hinge mechanisms fitted.

Whichever material you choose, all truhouse. flush casement windows are composed of robust multichambered profiles and fitted with the latest high security multipoint locking mechanisms (shootbolt espagnolettes, bidirectional cams, roller cams, and shootbolt locks) that engage on three sides of the opening sash. Metal anti-jemmy hinge bolts are installed on the remaining side to prevent your hinges being forced open. With each side of the opening sash fully secured with the turn of a handle, our flush casement windows ensure your home is protected against potential intruders.

High security fire escape hinges, also known as egress friction hinges, are fitted as standard, providing you with maximum clearance in the event you need to exit through your window in an emergency (dependent on window size).

Child safety hinges, known as tri-stay fire escape hinges, are also available on request, with a built in restrictor function to prevent children opening and falling out of windows (or even climbing in through open windows).

Six simple steps to your replacement flush casement windows


Complimentary design consultation and quick, FREE, no-obligation quote.


Precise measurements and planning ensures perfection everytime.


Ensure you make the right decision for you – sleep on it for 7 days!


Your new flush casement windows will be expertly crafted in Britain.


Professional installation within 3 weeks*, leaving your home clean and tidy.


FENSA registration and 10-year guarantee for added peace of mind.

* Lead times may vary subject to requirements and demand.

Flush casement window installation area

Our core installation area spans 437 towns and villages and 27 different postcode districts across the counties of Gloucestershire and Wiltshire, including:

  • Cheltenham
  • Cirencester
  • Gloucester
  • Stroud
  • Chippenham
  • Lechlade
  • Malmesbury
  • Tewkesbury

Outside the area? When possible, our expert team love to travel further afield to show customers a tru. difference, so please don’t hesitate to call on our services.

Unsure if truhouse. covers your area?

Trusted by over 7,750 homeowners like you

More than 7,750 homeowners have used truhouse. to supply and install replacement windows and doors since 1982

Start your home improvement project today

Whether you have a modern, contemporary, or traditional home, we have the window for you!

  • Enhance the external and internal appearance of your home
  • Improve the quality of your living environment
  • Provide the best security from intruders
  • Protect your home from the elements and reduce your energy bills
  • Add value and character to your home
Get your FREE replacement window quote here
Price valid for 30 days
By providing your details you agree to being contacted under the terms of our privacy policy.

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